Search: id:A120425
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%I A120425
%S A120425 1,1,2,2,2,2,3,3,3,2,2,2,4,4,4,4,3,3,3,3,5,5,5,5,5,4,4,4,4,4,6,6,6,6,6,
%T A120425 6,4,4,4,4,5,5,7,7,7,7,7,7,7,5,4,4,4,4,4,4,8,8,8,8,8,8,8,8,6,6,6,6,6,6,
%U A120425 6,6,9,9,9,9,9,9,9,9,9,5,5,5,7,7,7,7,7,7,10,10,10,10,10,10,10,10,10,10
%N A120425 a(n) = maximum value among all k where 1<=k<=n of GCD(k,ceiling(n/k)).
%H A120425 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%e A120425 For n = 10, we have the pairs {k,ceiling(n/k)} of {1,10},{2,5},{3,4},
               {4,3},{5,2},{6,2},{7,2},{8,2},{9,2},{10,1}. The GCD's of these 10 
               pairs are 1,1,1,1,1,2,1,2,1,1. Of these, 2 is the largest. So a(10) 
               = 2.
%t A120425 Table[Max[Table[GCD[k, Ceiling[n/k]], {k, 1, n}]], {n, 1, 100}] - Stefan 
               Steinerberger (stefan.steinerberger(AT)gmail.com), Jul 22 2006
%Y A120425 Sequence in context: A143901 A115263 A055894 this_sequence A104186 A092363 
               A133874
%Y A120425 Adjacent sequences: A120422 A120423 A120424 this_sequence A120426 A120427 
               A120428
%K A120425 nonn
%O A120425 1,3
%A A120425 Leroy Quet Jul 12 2006
%E A120425 More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), 
               Jul 22 2006

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